Process for the selective reclamation treatment of used foundry sand
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United States of America Patent
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Jun 15, 1993
Grant Date -
N/A
app pub date -
Aug 14, 1991
filing date -
Aug 16, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for the selective reclamation treatment of used foundry sands wherein separation of parts of the binding materials from the basic granular material is effected by mechanical means and, thereafter, the sand grains are accelerated to produce an abrasive action of the individual sand grains with one another. The treated grains are then separated into large and small grains and further treatment is effected on the small grains.
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